Catalysts 10.2 Flashcards
What do catalysts do?
Increase the rate of reaction
How do catalysts increase the rate of reaction?
By creating an alternative reaction pathway with a lower activation energy
Are catalysts used up in a reaction?
No
What are some of the ways that catalysts create alternative reaction pathways?
-Reacting with the reactants to create an intermediate
-Creating a surface for the reaction to occur
What happens to homogenous catalysts after the reaction ends?
The catalyst is regenerated
What are two types of catalysts?
-Homogenous Catalysts
-Heterogenous Catalysts
What are heterogenous catalysts?
Catalysts that have a different physical state from the reactants.
What are homogenous catalysts?
Catalysts that have the same physical state as the reactants that form intermediates
What percentage of chemical materials are produced with catalysts?
90%
Why are catalysts good to use from a sustainable point of view?
Catalysts reduce the temperature needed for a reaction to take place. Less electricity and less fossil fuel is used
Why are catalysts good to use from a sustainable point of view
Using less energy can cut costs, which increase profitability
How do heterogenous catalysts work?
1.) (absorption) One of the reactants approaches the surface of the catalyst and binds to an active site.
2.) Another reactant approaches the catalyst
3.) Re-arrangement of the electrons takes place (reaction)
4.) (desorption) Reactants are released from the catalyst
How do homogenous catalysts work?
They form intermediates by reacting with the reactants. The intermediate then breaks down to give product and then regenerates when the reaction is complete.
